[Python-Dev] open() mode is lax (original) (raw)
Tim Peters tim.peters at gmail.com
Thu Mar 16 04:21:07 CET 2006
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[Greg Ewing]
I've just noticed that (in 2.3.4) open() seems to accept just about anything after the first character of the mode argument:
Python 2.3.4 (#1, Jun 30 2004, 16:47:37) [GCC 3.2 20020903 (Red Hat Linux 8.0 3.2-7)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> f = open("DU", "rqwerty") >>>
Yes. That's because virtually all C libraries accept just about anything in the mode string, so that code using mode-string extensions specific to other platforms doesn't just blow up. Python passes the mode string on to the platform C, and complains if and only if the platform C complains.
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